Perforating-machine for leather



(NofModeL) 3 Sheets-Shet 1.

G. KNIGHT. V PERPORATING MACHINE FOR LEATHER.

Patented Nov. 26,1895.

ANDREW B GRAHAM.PHOTD UMQWASHINGYONJC Z'Jwmases.

(No Model.) I 3 Sheets-Sheet 2.

G. KNIGHT. PERFORATING MACHINE r011 LEATHER.

No. 550,450. Patented Nov. 26, 1895.

AN DREW B GRAHAM. PHOTOUTHQWASHINGTOMEC (No Model.) 3 Sheets-Sheet 3. G.KNIGHT. PERFORATING MACHINE FOR LEATHER.

No. 550,450. Patented Nov. 26, 18.95.

ND 5 W g I b UNITED STATES PATENT OFFICE.

GEORGE KNIGHT, OF BROOKTON, MASSACHUSETTS.

PERFORATING-MAGHINE FOR LEATHER.

SPECIFICATION forming part of Letters Patent No. 550,450, dated November26, 1895.

Application filed June 24, 1895. Serial No. 553,785. (No model.)

To all whom it may concern:

Be it known that I, GEORGE KNIGHT, of Brockton, county of Plymouth,State of Massachusetts, have invented an Improvement inPerforating-Machines for Leather and the Like, of which the followingdescription, in connection with the accompanying drawings, is aspecification, like letters on the drawings representing like parts. i

This invention has for its object the production of an improved andsimplified machine for perforating leather or other stock, the machinebeing especially adapted for perforating boot and shoe uppers for thereception of usual lacing eyelets or hooks.

In the manufacture of boots and shoes it is necessary to have differentgangs of punches or perforators for the different sizes or shapes of thevarious uppers, and I have aimed to so construct a machine as to enablean operator to perforate the largest number possible of uppers.

In accordance with my invention I provide a single (what I shall call\vork) support, and I mount the perforators or punches at opposite sidesof this work-support in suitable carriers, preferably pivoted andprovided with means for moving the carriers toward and from the oppositesides of the said work-support, and to obtain a change in the number,size, or arrangement of punches it is necessary simply for the operatorto transfer the work from one to the other side of the worksupport,thereby enabling the operator to handle large numbers of pieces ofdifferent shapes or sizes with little waste of time for changes. y

In the drawings, Figure 1 is a top or plan view, partially broken away,of the machine embodying my invention; Fig. 2, a left-hand end elevationof Fig. 1; Fig. 3, a vertical longitudinal section taken on the dottedline :20 m, Fig. 1; and Fig. 4 a detail to be referred to.

In the particular embodiment of my invention herein selected forillustration and shown in the drawings, A is a frame or bed of suitableshape and construction to sustain the several parts, and it is hereinshown as mounted upon suitable legs a a.

At one end of the frame A (see Fig. 3) the machine shown is providedwith a horizontal table, or as I shall hereinafter denominate it,-

work-support 1), shown as provided at its opposite sides with threadedstuds b,on which are screwed the clamping-nuts b for securing to thework-support the work-supporting facepieces b slotted to receive thestuds,as shown. These face-pieces may be provided with suitable brass orother preferably soft metal or material-perforating plates 6 O D arecarriers pivoted, respectively, at c d in the frame, and at theirextreme righthand ends, Fig. 3, have jointed to them at c d theconnecting-rods 0 (1 connected, respectively,with two cranks 0 (1 thelatter shown only in dotted lines, Fig. 3, on the main or driving shaftd of the machine.

In the present instance of my invention there are two cranks darranged,respectively, at opposite sides the crank 0 and there aretherefor two connecting-rods (1 which straddle a single connecting-rod 0The shaft 01 is driven by or from a suitable pulley d through suitableintermediate usual clutch mechanism, which need not be herein shown, asit forms no part of my invention, said clutch mechanism being under thecontrol of a clutch-lever d, which may be connected by anoperating-chain 61 (see Fig. 2,) with a suitable treadle. (Not shown.)Rotation of the driving-shaft 61 will cause the opposite or front endsof the carriers 0 D to simultaneously move toward and from thework-support I), like the opening and closing of a pair of shears.

The carriers 0 D are fitted at their front ends with suitable punches orperforatorsj as I shall hereinafter call them, e f, the same as hereinshown, being tubular in form and mounted in suitable heads 6 f, whichare clamped to the front ends of the carriers by suitableclamping-screws e f which are carried through the ends of the carriersand provided outside the same with suitable clamping-nuts 6 f In thepresentinstance of my invention the bolts or screws 6 f 2 at their innerends are provided with laterally-extended and enlarged heads 6 f throughwhich are extended guiding-pins (2 f which prevent rotation of the boltsduring rotation of the nuts. The heads 6 f are slotted to receive thepins e f and the face-pieces b with the limiting or SIZOP.

pieces h h, which are suitably and preferably adjustably attached to thesaid face-' pieces 5 and to these stops h I have, in the presentinstance of my invention, secured, as byscrews, the stripper-plates m n.The stripper-plate m, herein shown as at the upper side of thework-support, has its outer edge serrated or notched to receive theperforators e f, the portions of the plate between the notches extendingas so many fingers between the perforators, and the stripper-plate n isprovided with a series of holes at, through which the perforators work,said stripperplate a being projected forward beyond the front of themachine to serve as a table on which the work may be positioned prior tothe perforating operation.

The operation of the machine is as follows, viz: The operator insertsthe two quarters to be perforated beneath the stripper m and upon theplate b with their edges in contact with the stop It and operates theclutch to cause the perforators e'to descend and perforate the quartersadjacent the edges thereof. The operator continues to employ theperforators e as long as required in perforating any particular sizes orquarters, the lower carrier D with its perforator-s operatingcontinuously all the time, but performing no work. \Vhen the operatorcomes to a batch of quarters of different size-for instance, thoselarger than can be perforated by the perforators e he simply insertsthem beneath the work-support and the table and against the stripper nthereat and uses the lower series of perforators f so long as needed. Itis also possible for an expert operator to use both series at the sametime.

In practice a single series of perforators is usually sufficient forthree sizes of uppersthat is, for the uppers of three sizes of shoesaseries made right for a six shoe being also considered near enough for afive and a seven shoe, and thelower series of perforators f, if made fora nine, is near enough to an eight or a ten shoe for practical purposes,so that by providing the two series of perforators arranged andoperating as shown the operator has before him at all times properperforators for all sizes of mens shoes.

. The strippers m and or serve to prevent the stock following theretreating perforators.

The work-supporting faces referred to in the claims are the faces whichsupport the work during the perforating operation, and toward which andfrom the perforators move.

My invention is not limited to the particular embodiment herein shown,for it is evident that the same may be varied without departing from thespirit and scope of my invention.

I claim 1. In a machine of the class described, a work-support havingwork-supporting faces at its opposite sides against either of which, atwill, and without necessary change in the machine, the work may beplaced, a plurality of perforator carriers arranged respectively atopposite sides of and movable toward and from the said work-support,perforators on the said carriers, and means to move the latter,substantially as described.

2. In a machine of the class described, a work-support having oppositework-supporting faces against, either of which, at will, the work may beplaced, aplurality of perforator carriers arranged respectively atopposite sides of said work-support, perforators on the said carriers,and means to simultaneously move the latter toward and from saidworksupport, substantially as described.

3. In a machine of the class described, a work-support having oppositework-supporting faces against, either of which, at will, the work may beplaced, a plurality of perforator carriers arranged respectively atopposite sides of said work-support and movable toward and from thesame, perforators on the said carriers, and strippers for theperforators of said carriers to prevent the stock following theretreating perforators, substantially as described.

4. I11 a machine of the class described, a work-support having oppositework-supporting faces against, either of which, at will, the work may beplaced, pivoted carriers arranged respectively at opposite sides saidsupport, perforators removably attached to said carriers and adapted onmovement of the latter to move toward and from said work-support, andstrippers for the perforators of said carriers, one of said strippersserving as a work-table preparatory to the perforating operation,substantially as described.

5. The work-support b, work-supporting faces adj ustably secured toopposite sides thereof, the stops and strippers, the pivoted perforatorcarriers, and perforators adjustably attached thereto, the driving shaftand connections between the same and carriers to operate the latter bythe former, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE KNIGHT. Witnesses:

FREDERICK L. EMERY, EMMA J. BENNETT.

